Abstract

This paper presents the results of a numerical study of the liquid heating process during collapse of a single spherical cavitation bubble in water at a liquid pressure of 10 bar, temperature of 20°C, and an initial bubble radius of 500 μm. The simulation of this phenomenon took into account the thermal conductivity of the vapor in the bubble and the surrounding liquid, heat transfer and evaporation/condensation on the surface of the bubble, and the effects of viscosity and compressibility of the liquid. It is shown that, as a result of bubble collapse, the liquid heats up in a region of about 60 μm radius. The temperature in the center of this region is about 50°C higher than in the surrounding liquid. The thermal energy expended on heating the liquid in this region is approximately equal to 25 μJ.

中文翻译：

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单个空化泡破裂期间的液体加热

摘要

本文介绍了在水压为10 bar，温度为20°C，初始气泡半径为500μm的水中单个球形空化气泡破裂期间液体加热过程的数值研究结果。对这种现象的模拟考虑了气泡和周围液体中蒸气的热导率，气泡表面上的热传递和蒸发/冷凝以及液体的粘度和可压缩性的影响。结果表明，由于气泡破裂，液体在半径约60μm的区域内变热。该区域中心的温度比周围液体的温度高约50°C。在该区域中加热液体所消耗的热能大约等于25μJ。